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Document Type |
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Article In Journal |
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Document Title |
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Photosynthetic response of Egyptian cultivar of broad bean (Vicia faba L.) to UV-B and drought, singly and in combination استجابة عمليات البناء الضوئي في نبات الفول للأشعة فوق البنفسجية والجفاف منفردين أو سويآ |
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Subject |
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Environmental Sciences |
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Document Language |
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English |
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Abstract |
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Bean plants grown under field conditions were exposed to drought stress (DS) and supplementary ultraviolet-B radiation (sUV-B) singly and in combination (DS + sUV- B). The effects of these two stresses on net photosynthetic rate (PN), stomatal conductance (gs), quantum efficiency of photosystem II (ФPSII), variable to maximum chlorophyll (Chl) fluorescence (Fv/Fm), photochemical (qp) and non-photochemical (NPQ) Chl fluorescence, biomass and yield were investigated. PN, gs, chlorophyll (Chl) content, and NPQ were dramatically reduced due to exposure to DS by 54, 41, 29, and 12% and by 19, 19, 16 and 12% due to exposure to s UV-B, respectively. This reduction resulted in a change in assimilate allocation in favour of shoot growth leading to a decrease in root to shoot ratio and eventually to a decrease in relative growth rate (RGR) of both root and shoot. Seed yield was decreased by 27 and 23% due to DS and s UVB, respectively. Their interaction was more than additive. Qp showed no significant response to sUV-B. There was antagonistic interaction between DS and sUB-V showing that DS effectively protects against the adverse effects of sUV-B. |
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ISSN |
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2251-0044 |
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Journal Name |
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International Research Journal of Agricultural Science and Soil Science |
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Volume |
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1 |
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Issue Number |
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11 |
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Publishing Year |
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1433 AH
2011 AD |
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Article Type |
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Article |
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Added Date |
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Sunday, February 12, 2012 |
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Researchers
| إبراهيم عبدالمجيد حسن | Hassan, Ibrahim A. | Investigator | Doctorate | ihassan_eg@yahoo.com |
| Hanan M. Aou-Zeid | Aou-Zeid, Hanan M. | Researcher | Doctorate | |
| جلال محمد باصهي | Basahi, Jalal Mohammed | Researcher | Doctorate | jbasahi@kau.edu.sa |
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Files
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32268.pdf
| pdf | Photosynthetic response of Egyptian cultivar of broad bean (Vicia faba L.) to UV-B and drought, singly and in combination |
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